{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "import tkinter\n",
    "import tkinter.messagebox\n",
    "import os\n",
    "import os.path\n",
    "path=os.getenv('temp')\n",
    "filename=os.path.join(path,'info.txt')                  \n",
    "root=tkinter.Tk()                                           #创建应用程序窗口\n",
    "root['height']=140                                          #定义窗口大小\n",
    "root['width']=200\n",
    "labelName=tkinter.Label(root,text='用户名:',             #在窗口上创建标签组件\n",
    "                        justify=tkinter.RIGHT,\n",
    "                        anchor='e',\n",
    "                        width=80)\n",
    "labelName.place(x=10,y=5,width=80,height=20)                #把组件放置到窗口上指定区域\n",
    "  #创建字符串变量和文本框组件，同时设置关联的变量\n",
    "  # 可以通过关联变量来读取或修改文本框内的文本\n",
    "varName=tkinter.StringVar(root,value='')\n",
    "entryName=tkinter.Entry(root,\n",
    "                        width=80,\n",
    "                        textvariable=varName)\n",
    "entryName.place(x=100,y=5,width=80,height=20)\n",
    "labelPwd=tkinter.Label(root,\n",
    "                       text='密码:',\n",
    "                       justify=tkinter.RIGHT,\n",
    "                       anchor='e',\n",
    "                       width=80)\n",
    "labelPwd.place(x=10,y=30,width=80,height=20)\n",
    "#创建密码文本框\n",
    "varPwd=tkinter.StringVar(root,value='')\n",
    "entryPwd=tkinter.Entry(root,\n",
    "                       show='*',                        #不管输入什么，都显示星号\n",
    "                       width=80,\n",
    "                       textvariable=varPwd)\n",
    "entryPwd.place(x=100,y=30,width=80,height=20)\n",
    "#尝试自动填写用户名和密码\n",
    "try:\n",
    "    with open(filename) as fp:\n",
    "        n,p=fp.read().strip().split(',')\n",
    "        varName.set(n)\n",
    "        varPwd.set(p)\n",
    "except:\n",
    "    pass\n",
    "#记住我，复选框\n",
    "remberMe=tkinter.IntVar(root,value=1)\n",
    "#选中时变量值为1，未选中时变量值为0，默认选中\n",
    "checkRember=tkinter.Checkbutton(root,\n",
    "                             text='记住账号密码?',\n",
    "                             variable=remberMe,\n",
    "                             onvalue=1,\n",
    "                             offvalue=0)\n",
    "checkRember.place(x=30,y=70,width=120,height=20)\n",
    "#登录按钮事件处理函数\n",
    "def login():\n",
    "    #获取用户名和密码\n",
    "    name=entryName.get()\n",
    "    pwd=entryPwd.get()\n",
    "    if name=='admin' and pwd=='123456':\n",
    "        tkinter.messagebox.showinfo(title='提醒',\n",
    "                                       message='登录成功！')\n",
    "        if remberMe.get()==1:\n",
    "            #把登录成功的信息写入临时文件\n",
    "            with open(filename,'w') as fp:\n",
    "                 fp.write(','.join((name,pwd)))\n",
    "    else:\n",
    "        try:\n",
    "            #删除用于记录用户名和密码的临时文件\n",
    "            os.remove(filename)\n",
    "        except:\n",
    "            pass\n",
    "        else:\n",
    "            tkinter.messagebox.showerror('warning',\n",
    "                                            message='用户名或密码错误')             \n",
    "   #创建按钮组件，同时设置按钮事件处理函数\n",
    "buttonOk=tkinter.Button(root,\n",
    "                           text='登录',          #设置按钮上显示的文本\n",
    "                           command=login)         #设置按钮的单击事件处理函数\n",
    "buttonOk.place(x=30,y=100,width=50,height=20)\n",
    "#取消按钮的事件处理函数\n",
    "def cancel():\n",
    "#清空用户输入的用户名和密码\n",
    "    varName.set('')\n",
    "    varPwd.set('')\n",
    "buttonCancel=tkinter.Button(root,\n",
    "                            text='取消',\n",
    "                            command=cancel)\n",
    "buttonCancel.place(x=90,y=100,width=50,height=20)\n",
    "                            #启动消息循环\n",
    "root.mainloop()\n",
    "                           "
   ]
  }
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